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Vol. 170, Issue 5, May 2014, pp. 256-261

 

Bullet

 

A New Error Analysis and Accuracy Synthesis Method for Shoe Last Machine
 

Bian Xiangjuan, Li Xiaolei

School of Faculty & technology, Zhejiang International Studies University, Hangzhou, 310012 China

E-mail: bianxiangjuan@163.com

 

 

Received: 21 Mach 2004 /Accepted: 30 April 2014 /Published: 31 May 2014

Digital Sensors and Sensor Sysstems

 

Abstract: In order to improve the manufacturing precision of the shoe last machine, a new error-computing model has been put forward to. At first, Based on the special topological structure of the shoe last machine and multi-rigid body system theory, a spatial error-calculating model of the system was built; Then, the law of error distributing in the whole work space was discussed, and the maximum error position of the system was found; At last, The sensitivities of error parameters were analyzed at the maximum position and the accuracy synthesis was conducted by using Monte Carlo method. Considering the error sensitivities analysis, the accuracy of the main parts was distributed. Results show that the probability of the maximal volume error less than 0.05 mm of the new scheme was improved from 0.6592 to 0.7021 than the probability of the old scheme, the precision of the system was improved obviously, the model can be used for the error analysis and accuracy synthesis of the complex multi- embranchment motion chain system, and to improve the system precision of manufacturing.

 

Keywords: Monte Carlo method, Multi-rigid body, Error analysis, Accuracy synthesis.

 

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